#include <iostream>
#include <string>
using namespace std;

int main() {
    int n;
    cin >> n;
    string str = "Hello World";
    for (size_t i = 0; i < str.size(); ++i) {
        if (str[i] == '1') {
            str[i] = '0' + n;
        }
    }
    cout << str << endl;
    return 0;
}